Well, dropping it sure isn't good for it (pen or tablet)!
I'd lean more towards tilting the pen tool to much. It's happened to me before, where it stops working suddenly, and when I stop and look, I've got the pen tilted wayyyyy to much. I don't ever recall getting a tablet driver on the taskbar-I've always had to go into the program itself (via control panel) and adjust things from there.
If it acts up again, I'd uninstall it, download the latest drivers from the wacom site, then reinstall it.
War produces veterans, wounded both physically and mentally. They have sacrificed for us.....and it is now our job to help these veterans, as they have already helped us in ways we will never know, in ways that we cannot fathom, and in ways that we take granted every day.